Win32.Cafeini falls under the category of backdoor Trojan.  These programs are particularly dangerous because once inside they can give access to a hacker who will then have remote access to your machine.  They can enter secretly and run silently which make them difficult to detect.

Recommended Action:
Remove at Once

AKA:
Backdoor.Win32.Cafeini.11
Backdoor.Cafeini.11
BackDoor-GX.cli
Backdoor.Trojan
BackDoor.Cafeini.11
Troj/Cafeini
Backdoor:CafeIni.1_1
BKDR_CAFEINI.11
BDC/Cafeini.11.Cli
Win32:Trojan-gen.
BackDoor.Cafeini
Backdoor.CafeINI.1.1
Trojan.Cafeini.10-cli
Bck/Cafeini.11
Win32/Cafeini.11.Client

Manual Removal:
If you want to remove Win32.Cafeini manually, you will need to stop all of the running processes and then remove all related files.  Use caution, though, because manual removal does have some unwanted consequences if done improperly.

If you are nervous at all about manual removal, try a remover that has been tested on countless machines and removed literally thousands of spyware programs.  ZookaWare PC Cleaner is an award-winning system that promises to clear ALL spyware from your PC or your money back.